Finding the Fourth Proportional to 142,842.20, 214,287.90 and 58,648.18

Step by Step Solution

1. Step 1: Write the proportion equation
   142,842.20 : 214,287.90 = 58,648.18 : x
2. Step 2: Convert to fraction form
   142,842.20/214,287.90 = 58,648.18/x
3. Step 3: Cross multiply
   142,842.20x = 214,287.90 × 58,648.18
4. Step 4: Simplify right side
   142,842.20x = 12,567,595,331.02
5. Step 5: Solve for x
   x = 12,567,595,331.02/142,842.20
6. Step 6: Final answer
   x = 87,982.37